Abstract
The analysis of coke quality and the effect of coke quality on blast furnace process was presented in this paper. The mechanical properties of cokes was determined by the MICUM method, the same coke samples were hot tested in the blast-furnace pre-tuyère chamber model at the Department of the Extraction and Recycling of Metals of the Czestochowa University of Technology to determine their thermo-abrasiveness ξ. Moreover, the permeability of the column of materials in the blast furnace during the use of those cokes was determined. The permeability of the materials column characterizes the “quality” of the materials, including the coke. Separating the coke features in this characteristics is possible with the remaining charge and technological conditions being stabilized. However, the high variability of charge conditions in the blast-furnace under examination distorts the existing permeabilities. Nevertheless, the dependence of the permeability on thermo-abrasiveness was “physically” correct, i.e. it decreased with increasing thermo-abrasiveness ξ, despite the small value of the coefficient of significance of this relationship.
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